Lines, Angles, and Symmetry
Grade Four · Lesson 31 · 4:51 · Animated lesson with English narration
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Transcript
All four sides are equal. This is a square. Draw a line of symmetry. Fold along the line of symmetry. The two triangles match perfectly. Angle one equals angle two. Now, a triangle.
All three sides are b. This is an isosceles triangle. Draw a line of symmetry. Fold along the line of symmetry. The two halves match perfectly. Angle one equals angle two. One Two Three One Two Three
One Two Three All three axes go through a vertex. None do not. One Two Three Four One Two Three Four One Two Three Four Two axes go through a vertex. Two do not. One Two Three Four Five One Two Three
Four Five One Two Three Four Five All five axes go through a vertex. None do not. One Two Three Four Five Six One Two Three Four Five Six One Two Three Four Five Six Three axes go through a vertex.
Three do not. One Two Three Four One Two Three Four No axes of symmetry. One Two Three Four One Two Three Four No axes of symmetry.
Transcript generated from the lesson narration.
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